We believe that many people are being wrongly convicted by suspect black boxes, which if the source code were availiable this could be proven.
Devices like speed guns etc should all be open source so all concerned can be sure they are working correctly, and highlight errors if they are not. There is no justice from a black box.
One highly suspect device in current use is the LTI 20-20 laser speed gun. Give us the source code so we can inspect it: